#include <iostream>

using namespace std;

int main()
{
    int N,A,B,C;
    A=5; B=2; N=0;
    cin >> N;
    switch (N){
    case 1:
        C=A+B;
        cout << C<< endl;
        break;
    case 2:
        C=A-B;
        cout << C<< endl;
        break;
    case 3:
        C=A*B;
        cout << C<< endl;
        break;
    case 4:
        C=A/B;
        cout << C<< endl;
        break;
    default:
        break;}
    return 0;
}

